Submission #1039117

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039117		VMaksimoski008	Combo (IOI18_combo)	C++17	100 / 100	19 ms	1384 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;


string guess_sequence(int N) {
    string S = "";

    if(press("XY")) {
        if(press("X")) S += 'X';
        else S += 'Y';
    } else if(press("A")) {
        S += 'A';
    } else {
        S += 'B';
    }

    vector<char> vec;
    for(auto &ch : {'A', 'B', 'X', 'Y'}) if(ch != S[0]) vec.push_back(ch);

    //press(p) dava dolzina na najdolg prefix na S sto e substring na p
    while(S.size() + 1 < N) {
        int len = press(S + vec[0] + vec[0] + S + vec[0] + vec[1] + S + vec[1] + vec[0]);
        if(len == S.size()) {
            S += vec[2];
        } else if(len == S.size() + 1) {
            int x = press(S + vec[1] + vec[2]);
            if(x == S.size() + 2) {
                S += vec[1];
                S += vec[2];
            } else if(x == S.size() + 1) {
                S += vec[1];
                S += vec[1];
            } else {
                S += vec[0];
                S += vec[2];
            }
        } else {
            int x = press(S + vec[0] + vec[0]);
            if(x == S.size() + 2) {
                S += vec[0];
                S += vec[0];
            } else if(x == S.size() + 1) {
                S += vec[0];
                S += vec[1];
            } else {
                S += vec[1];
                S += vec[0];
            }
        }
    }

    if(S.size() < N) {
        if(press(S + vec[0]) == S.size() + 1) S += vec[0];
        else if(press(S + vec[1]) == S.size() + 1) S += vec[1];
        else S += vec[2];
    }

    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:22:24: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   22 |     while(S.size() + 1 < N) {
      |           ~~~~~~~~~~~~~^~~
combo.cpp:24:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         if(len == S.size()) {
      |            ~~~~^~~~~~~~~~~
combo.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         } else if(len == S.size() + 1) {
      |                   ~~~~^~~~~~~~~~~~~~~
combo.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |             if(x == S.size() + 2) {
      |                ~~^~~~~~~~~~~~~~~
combo.cpp:31:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             } else if(x == S.size() + 1) {
      |                       ~~^~~~~~~~~~~~~~~
combo.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |             if(x == S.size() + 2) {
      |                ~~^~~~~~~~~~~~~~~
combo.cpp:43:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |             } else if(x == S.size() + 1) {
      |                       ~~^~~~~~~~~~~~~~~
combo.cpp:53:17: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   53 |     if(S.size() < N) {
      |        ~~~~~~~~~^~~
combo.cpp:54:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |         if(press(S + vec[0]) == S.size() + 1) S += vec[0];
      |            ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:55:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         else if(press(S + vec[1]) == S.size() + 1) S += vec[1];
      |                 ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95